Reactor



nited States Patent Office 2,713,65 Patented July 19, 1955 REACTOR Wayne Lee Roy Henderson, Fort Wayne, Ind., assignor to General Electric Company, a corporation of New York Application February 19, 1954, Serial N 0. 411,440

4 Claims. (Cl. 336160) This invention relates to reactors and more particularly to a reactor having two coils mounted on a single core adaptable for use as either a single reactor or as two separate reactors.

The designer of ballasting devices for are discharge devices, for example mercury vapor lamps, is confronted with certain circuits which require two reactors and with other circuits which require only a single reactor. In the were provided. It is desirable, however, in order to effect maximum economy of material and space to provide a reactor construction incorporating two separate reactors on a common core. Furthermore, in order to reduce the number of models of reactors which must be supplied, it is desirable that such a reactor be adaptable for use with a number of case of the latter requirement, 1. e. two reactors supplying separate loads, it is also desirable that the device be adaptable for loads With lagging current,

uniform width, or in the alternative two air gaps of unequal width.

It is therefore an object of this invention to provide an improved reactor construction incorporating the desirable features set forth above.

Further objects and advantages of this invention will be accompanying drawing, and

the features of novelty which characterize this invention will be pointed out with particularity in the claims annexed to and forming a part of r this specification.

This invention in having a shell type and respectively arranged in the coil windows. rangernent thus far described provides a to supply one load. In order to provide for supplying leading power factor current to one load and power factor current to another load, the two projections may be made of unequal length and a notch is formed in one of the portions toward which one of the projections extends. The center leg portion may then be selectively positionable so that either the longer or shorter projection is adjacent the notch so that the air be made of equal width or of unequal In the drawing, Fig. l is a view in the improved reactor of this invention;

Fig. 2 is a plan view of the core of the reactor of this gaps may selectively width. perspective showing invention showing the center leg in one position;

Fig. 3 is a view similar to Fig. 2 showing the center leg in its other position;

Fig. 4 is a schematic view showing the two reactor coils connected in parallel to supply a single load;

Fig. 5 is a schematic view showing the two reactors connected in series to supply a single load;

.. bolts 16 for holding the center shorter projection 12 extends Fig. 6 is a schematic view showing the two reactors connected for supplying separate loads; and

Fig. 7 is a schematic view showing the two reactors connected to supply two separate loads, one with leading power factor current and the other with lagging power factor current.

Referring now to Figs. 1, 2 and 3 of the drawing, there is shown a reactor having a core member generally iden- 1. Core member 1 respectively defines coil windows 27 and 28 with yoke tending respectively into coil Windows 27 and 28 toward side legs 4 and 5. Projection 12 is shorter than projection formed in the inner edge of side leg Notches 18 may be formed in the outer edges of end portions 6 and 7 for mounting the complete reactor in an enclosing case (not shown).

Referring now specifically to Fig. 2, it is seen that the toward side leg 4 of yoke 2 the pos1tion shown in Fig. 2, the airgap 19 defined belagging tween projection 12 and side leg 4 will be equal in width to the air gap 29 defined between projection 13 and notch 14 in side leg 5.

3, it will be seen that center leg 3 so that a pair of reactor respectively positioned on projections in coil windows 27 12 and 13 of center leg member 3 and 28.

Referring now to Figs. 4, 5, 6 and 7, it will be seen that July 19, 1955 D. o. SCHWENNESEN AUDIO FREQUENCY TRANSFORMER Filed Dec. 21, 1953 INPUT OUTPUT INVEN TOR. DONALD O ScHwNN$N 

